Himself an electrician

As you know, galvanic elements, batteries, accumulators and many generators do not have high-efficient, fast trigger protection against short circuits (a short circuit). No its in most sources of the secondary power supply Fuse the fuse, there is not in the bill. First, because the response time, is often absolutely not suitable for modern equipment, instantly reacting to abnormal situations. Second, fuses are one-time protection devices, requiring replacement by a new after his burnout, not everywhere and not always acceptable.

There are electric circuits of high voltage sources for aeroionizatora, which are collected on the basis of the automotive ignition coil. They are all quite simple and easily repeatable. However, the cost of the ignition coil is very high.

Currently, it has become fashionable household electrical lamps with shades. The publication describes this decoration to the lamp, which is easy to do it yourself from simple materials.

The era of universal shortage has prompted us to create the things in the shops it was impossible to find. However, the era of abundance has not stopped this process. Apparently, a modest domestic work is now subject to other laws dictated by market prices or a passion.

There are situations when the lighting is required to manage not one, but two places. For example, when you need to turn on the light when entering in a number of areas on and off when you exit from the common hallway. The situation is similar in terms of covered walkway, tunnel, greenhouses or the like of the long room.

My invention is very simple, but quite important as regards health. The practical need for it — there. It is known that in the sinus, the number of colds and other diseases requires the heating of the nose and maxillary sinuses. Better suited for this UHF-therapy. However, at first, excessive exposure to currents of UHF may prove harmful to the body, and secondly, this equipment is complicated and cumbersome road. Therefore, this method of treatment, despite its advantages (depth of penetration, and disinfecting effect), not very applicable.

We offer a simple pocket radio with low voltage power from the supercapacitor. The receiver is fully on transistors, because the low voltage does not allow to use the existing chips (e.g., 174ХА10). Receiver of direct amplification, which provides sufficient volume to broadcast stations in the medium waveband and working in a range of supply voltages from 2 to 0.9 V.

In the “M-K” appear frequently describe designs that use integrated circuits. The production of these modern elements are so expanded that their widespread introduction in household equipment and in the development of ham radio now is no surprise. However, there still exists an opinion that “communication” is with chips only available to experienced hams. Meanwhile, in the chips can be used to create simple devices to collect that it is easy even for those who make their first steps in Amateur radio.

Fluorescent light (LDS) are widely used today in various industries and in everyday life. Unfortunately, the durability of LDS is extremely low. Their weak spot — helix required for the ignition of the phosphor inside the lamp at the time of inclusion. Two of them — from both ends of the lamp, and if even one of them burn out, to include LDS with the standard circuit (containing inductor, capacitor and starter) is impossible. In such a situation it is necessary to change the blown bulb with a new one. Therefore, where there are a large number of lamps (for example, in manufacturing plants, apartment buildings, stairwells and other similar cases), during the years of operation goes down and accumulates a lot of LDS with blown spirals.

Alexander Konochkin — student of the physical-technical faculty of Tomsk state University. The choice of the future profession is not accidental — since childhood Sasha enjoys improvised technical creativity.